I have owned a Fender USA Stu Hamm Urge bass from new(1993). Early last year I had the neck repaired by a local, so called, guitar repairer who sadly botched my lovely bass. The problems started when I ‘rounded’ the Allen key truss rod adjusting nut. The neck had too much relief and during the tightening of the truss rod the Allen nut rounded. A friend of mine recommended a local Guy who ‘claimed ‘he could replace the Allen headed adjusting nut on the truss rod without too much trouble